An 18ct gold diamond and mother-of-pearl 'Instarsio' necklace, Bulgari, designed as three circular motifs set within each other, applied with mother-of-pearl inlay and alternating with round brilliant-cut diamonds totalling an estimated 1.41 carats, to an adjustable belcher link necklace, length approximately 612 mm to 911 mm, signed Bulgari and numbered AY18F6, accompanied by a Bulgari receipt and box.